Patent GB-392797-A (GB)
Title: Rubber coating compositions for varnishing fabrics, leather and the like
IPC: D06M15/693
Filed: 1932-09-05
Abstract: An emulsion for use as a varnish, or coating consists of rubber latex, a drying oil or resin, an agglutinate such as casein or gelatine, and formaldehyde or a homologue thereof.  The drying oil may be mixed with resin or gum.  The emulsion may be applied to wood or metal as an electrical insulating material.  It may be used for coating or varnishing fabrics of animal or vegetable fibre, or natural leather, particularly when these materials have a first coating of macerated rubber or rubber latex with colouring matter. After the material has been coated with the rubber emulsion it is vulcanized.  If desired a top coating of nitrocellulose, acetylcellulose, or other cellulose ester or ether varnish, or a drying oil or resin varnish may be applied. In an example, fabric is coated several times with a paste of macerated rubber and with white lead, colouring matter, or artificial colours precipitated on white lead china clay or barytes.  Instead of macerated rubber, latex or "Revertex" containing casein and ammonia may be used.  The fabric is further coated with an emulsion consisting of rubber latex, drying oil or resin, casein dissolved in ammoniacal water, and formalin. The fabric is stamped or printed with the required design and is vulcanized in the cold with chloride of sulphur in a solvent such as benzene, benzine, carbon disulphide, carbon tetrachloride or xylene. If desired a further coating of nitrocellulose or other cellulose ester or ether varnish may be applied.  The imitation leather obtained may exhibit any desired graining, double-colour, or antique effects.  The latex or "Re vertex" may be mixed with preservatives and substances such as gelatine which prevent coagulation.  The intermediate and final coatings may also contain filling or colouring material.  In another example metal is coated first with a varnish of drying oil or gum and then with a rubber paste containing the same drying oil or gum.  The final varnish consists of rubber latex, casein, drying oil, and formalin.ALSO:An emulsion for use as a varnish, coating, or adhesive consists of rubber latex, a drying oil or resin, an agglutinate such as casein or gelatine, and formaldehyde or a homologue thereof.  The drying oil may be mixed with resin or gum.  The emulsion may be applied to wood or metal as an electrical insulating material, or it may be used as an adhesive for animal or vegetable fibres or fabrics, natural or artificial leather, wood, or metal.  It may be used for coating or varnishing fabrics of animal or vegetable fibre, or natural leather, particularly when these materials have a first coating of macerated rubber or rubber latex with colouring matter.  After the material has been coated with the rubber emulsion it is vulcanized.  If desired a top coating of nitrocellulose, acetylcellulose, or other cellulose ester or ether varnish, or a drying oil or resin varnish may be applied. In an example, fabric is coated several times with a paste of macerated rubber and white lead, colouring matter, or artificial colours precipitated on white lead, china clay, or barytes. Instead of macerated rubber, latex or "Revertex" containing casein and ammonia may be used.  The fabric is further coated with an emulsion consisting of rubber latex, drying oil or resin, casein dissolved in ammoniacal water, and formalin.  The fabric is stamped or printed with the required design and is vulcanized in the cold with chloride of sulphur in a solvent such as benzene, benzine, carbon disulphide, carbon tetrachloride or xylene.  If desired a further coating of nitrocellulose or other cellulose ester or ether varnish may be applied.  The imitation leather obtained may exhibit any desired graining, double-colour, or antique effects.  The latex or "Revertex" may be mixed with preservatives and substances such as gelatine which prevent coagulation.  The intermediate and final coatings may also contain filling or colouring material.  In another example metal is coated first with a varnish of drying oil or gum and then with a rubber paste containing the same drying oil or gum.  The final varnish consists of rubber latex, casein, drying oil, and formalin.